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https://www.readbyqxmd.com/read/28532672/molecular-insights-into-the-differences-in-anti-inflammatory-activities-of-green-tea-catechins-on-il-1%C3%AE-signaling-in-rheumatoid-arthritis-synovial-fibroblasts
#1
Sabrina Fechtner, Anil Singh, Mukesh Chourasia, Salahuddin Ahmed
In this study, we found that catechins found in green tea (EGCG, EGC, and EC) differentially interfere with the IL-1β signaling pathway which regulates the expression of pro-inflammatory mediators (IL-6 and IL-8) and Cox-2 in primary human rheumatoid arthritis synovial fibroblasts (RASFs). EGCG and EGC inhibited IL-6, IL-8, and MMP-2 production and selectively inhibited Cox-2 expression. EC did not exhibit any inhibitory effects. When we looked at the expression of key signaling proteins in the IL-1β signaling pathway, we found all the tested catechins could inhibit TAK-1 activity...
May 19, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28530714/cd8%C3%AE-%C3%AE-intraepithelial-lymphocytes-arise-from-two-main-thymic-precursors
#2
Roland Ruscher, Rebecca L Kummer, You Jeong Lee, Stephen C Jameson, Kristin A Hogquist
TCRαβ(+)CD4(-)CD8α(+)CD8β(-) intestinal intraepithelial lymphocytes (CD8αα IELs) are an abundant population of thymus-derived T cells that protect the gut barrier surface. We sought to better define the thymic IEL precursor (IELp) through analysis of its maturation, localization and emigration. We defined two precursor populations among TCRβ(+)CD4(-)CD8(-) thymocytes by dependence on the kinase TAK1 and rigorous lineage-exclusion criteria. Those IELp populations included a nascent PD-1(+) population and a T-bet(+) population that accumulated with age...
May 22, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28521404/silencing-tak1-alters-gene-expression-signatures-in-bladder-cancer-cells
#3
Jimin Chen, Nan Zhang, Jiaming Wen, Zhewei Zhang
The aim of the present study was to identify the differentially expressed genes (DEGs) that are induced by the silencing of transforming growth factor-β-activated kinase 1 (TAK1) in bladder cancer cells and to analyze the potential biological effects. Dataset GSE52452 from mutant fibroblast growth factor receptor 3 (FGFR3) bladder cancer cells transfected with control siRNA or TAK1-specific siRNA was downloaded from Gene Expression Omnibus. The DEGs between the two groups were identified using Limma package following data pre-processing by Affy in Bioconductor...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28520587/complementary-roles-of-nod2-in-hematopoietic-and-nonhematopoietic-cells-in-preventing-gut-barrier-dysfunction-dependent-on-mlck-activity
#4
Ziad Al Nabhani, Nicolas Montcuquet, Maryline Roy, Monique Dussaillant, Jean-Pierre Hugot, Frédérick Barreau
BACKGROUND: Crohn's disease (CD) pathogenesis is multifactorial involving genetic and environmental factors. Loss of function mutations in the nucleotide oligomerization domain 2 (NOD2) gene are the main genetic risk factor for CD. Like patients with CD, Nod2 mice are characterized by an enhanced Th1 immune response and a defective mucosal barrier function evidenced by increased intestinal permeability. We previously showed that the latter is related to hematopoietic Nod2 deficiency. Our aim was to explore the mechanisms by which Nod2 expressed in the hematopoietic and in the nonhematopoietic compartments interplay to control epithelial paracellular permeability...
May 16, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28507161/interleukin-1-and-traf6-dependent-activation-of-tak1-in-the-absence-of-tab2-and-tab3
#5
Jiazhen Zhang, Thomas Macartney, Mark Peggie, Philip Cohen
Interleukin-1 (IL-1) signaling induces the formation of Lys63-linked ubiquitin (K63-Ub) chains, which are thought to activate the "master" protein kinase TAK1 by interacting with its TAB2 and TAB3 subunits. Here, we report that IL-1b can also activate the TAB1-TAK1 heterodimer present in TAB2/TAB3 double knock-out (DKO) IL-1 receptor-expressing cells. The IL-1b-dependent activation of the TAB1-TAK1 heterodimer in TAB2/3 DKO cells required the expression and E3 ligase activity of TRAF6 and was reduced by the siRNA knock-down of Ubc13, an E2 conjugating enzyme that directs the formation of K63-Ub chains...
May 15, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28503189/eicosapentaenoic-acid-shows-anti-inflammatory-effect-via-gpr120-in-3t3-l1-adipocytes-and-attenuates-adipose-tissue-inflammation-in-diet-induced-obese-mice
#6
Hodaka Yamada, Tomio Umemoto, Masafumi Kakei, Shin-Ichi Momomura, Masanobu Kawakami, San-E Ishikawa, Kazuo Hara
BACKGROUND: Saturated fatty acids have been shown to cause insulin resistance and low-grade chronic inflammation, whereas unsaturated fatty acids suppress inflammation via G-protein coupled receptor 120 (GPR120) in macrophages. However, the anti-inflammatory effects of unsaturated fatty acids in adipocytes have yet to be elucidated. Hence, the aims of the present study were to evaluate the anti-inflammatory effects of eicosapentaenoic acid (EPA) via GPR120 in adipocytes. METHODS: We used 250 μM palmitate as a representative saturated fatty acid...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28498505/autosomal-dominant-frontometaphyseal-dysplasia-delineation-of-the-clinical-phenotype
#7
Emma M Wade, Zandra A Jenkins, Philip B Daniel, Tim Morgan, Marie C Addor, Lesley C Adés, Debora Bertola, Axel Bohring, Erin Carter, Tae-Joon Cho, Christa M de Geus, Hans-Christoph Duba, Elaine Fletcher, Kinga Hadzsiev, Raoul C M Hennekam, Chong A Kim, Deborah Krakow, Eva Morava, Teresa Neuhann, David Sillence, Andrea Superti-Furga, Hermine E Veenstra-Knol, Dagmar Wieczorek, Louise C Wilson, David M Markie, Stephen P Robertson
Frontometaphyseal dysplasia (FMD) is caused by gain-of-function mutations in the X-linked gene FLNA in approximately 50% of patients. Recently we characterized an autosomal dominant form of FMD (AD-FMD) caused by mutations in MAP3K7, which accounts for the condition in the majority of patients who lack a FLNA mutation. We previously also described a patient with a de novo variant in TAB2, which we hypothesized was causative of another form of AD-FMD. In this study, a cohort of 20 individuals with AD-FMD is clinically evaluated...
May 12, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28475177/the-role-of-hybrid-ubiquitin-chains-in-the-myd88-and-other-innate-immune-signalling-pathways
#8
REVIEW
Philip Cohen, Sam Strickson
The adaptor protein MyD88 is required for signal transmission by toll-like receptors and receptors of the interleukin-1 family of cytokines. MyD88 signalling triggers the formation of Lys63-linked and Met1-linked ubiquitin (K63-Ub, M1-Ub) chains within minutes. The K63-Ub chains, which are formed by the E3 ubiquitin ligases TRAF6, Pellino1 and Pellino2, activate TAK1, the master kinase that switches on mitogen-activated protein (MAP) kinase cascades and initiates activation of the canonical IκB kinase (IKK) complex...
May 5, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28474507/il-17f-induces-il-6-via-tak1-nf%C3%AE%C2%BAb-pathway-in-airway-smooth-muscle-cells
#9
Masayuki Nakajima, Mio Kawaguchi, Kyoko Ota, Junichi Fujita, Satoshi Matsukura, Shau-Ku Huang, Yuko Morishima, Yukio Ishii, Hiroaki Satoh, Tohru Sakamoto, Nobuyuki Hizawa
INTRODUCTION: Interleukin (IL)-17F plays a critical role in the pathophysiology of asthma. However, the precise role of IL-17F in airway smooth muscle cells (ASMCs) and its regulatory mechanisms remain to be defined. Therefore, we sought to investigate the expression of IL-6 by IL-17F and the involvement of transforming growth factor β-activated kinase 1 (TAK1) and nuclear factor (NF)-κB by in ASMCs. METHODS: ASMCs were cultured in the presence or absence of IL-17F...
June 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28465253/anti-inflammatory-action-of-2-carbomethoxy-2-3-epoxy-3-prenyl-1-4-naphthoquinone-cmep-nq-suppresses-both-the-myd88-dependent-and-trif-dependent-pathways-of-tlr4-signaling-in-lps-stimulated-raw264-7-cells
#10
Hyun Ju Woo, Do Youn Jun, Ji Young Lee, Hae Sun Park, Mi Hee Woo, Sook Jahr Park, Sang Chan Kim, Chae Ha Yang, Young Ho Kim
ETHNOPHARMACOLOGICAL RELEVANCE: The roots of Rubia cordifolia L. have been widely used as a traditional herbal medicine in Northeast Asia for treatment of inflammatory diseases. AIM OF THE STUDY: To elucidate the anti-inflammatory mechanism of 2-carbomethoxy-2,3-epoxy-3- prenyl-1,4-naphthoquinone (CMEP-NQ), purified from the roots of R. cordifolia L. as the major anti-inflammatory component, in LPS-treated RAW264.7 murine macrophage cells. MATERIALS AND METHODS: Anti-inflammatory activity of CMEP-NQ was investigated in LPS-treated RAW264...
April 29, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28460436/rab10-overexpression-promotes-tumor-growth-and-indicates-poor-prognosis-of-hepatocellular-carcinoma
#11
Wei Wang, Wei-Dong Jia, Bing Hu, Yue-Yin Pan
Hepatocellular carcinoma (HCC), one of the most common and lethal cancers worldwide, has a high recurrence rate with current treatment modalities. Identifying biomarkers for early diagnosis and discovering new sufficient molecular targets for the development of targeted therapies are urgently needed. RAB10, a member of the RAS family, has been shown to be highly expressed in HCC. However, the function of RAB10 in HCC is less studied. Here we report that RAB10 acts as an oncogene in HCC. The shRNA-mediated knockdown of RAB10 significantly reduced the proliferation of HCC cells and colony formation, induced cell cycle arrest at G0/G1 phase and increased apoptosis in vitro...
April 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28456576/influence-of-the-total-saponin-fraction-from-dioscorea-nipponica-makino-on-tlr2-4-il1r-receptor-singnal-pathway-in-rats-of-gouty-arthritis
#12
Qi Zhou, Fang Fang Lin, Shu Min Liu, Xiao Fang Sui
ETHNOPHARMACOLOGICAL RELEVANCE: Dioscorea nipponica Makino have been extensively used in traditional medicine for the treatment of arthritic diseases, particularly gouty arthritis (GA). MATERIALS AND METHODS: Sixty male Wistar rats were divided into six groups: the normal group, model group, colchicine group (COL) and three total saponin groups (RDN) (high dose [160 mg/kg], middle dose [80 mg/kg] and low dose [40 mg/kg]). The mRNA and protein expression levels of TLR2, TLR4, IRAK1, TRAF6, TAK1, IKKα, IκBα and NF-κB in the synovial tissue of joint were detected by realtime PCR and WB methods respetively...
April 26, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28446277/-effect-of-rna-interference-silenced-tak1-on-kasumi-1-cell-proliferation-inhibition-induced-by-as2o3-and-its-mechanism
#13
Sha Liu, Fang-Fang Yuan, Rui-Hua Mi, Xiao-Jiao Wang, Rui-Hua Fan, Xu-Dong Wei
OBJECTIVE: To explore the effect of transforming growth factor-β activated kinase-1(TAK1) gene silenced by RNA interference on proliferation inhibition of Kasumi-1 cells induced by As2O3 and its mechanism. METHODS: The experiments were divided into 4 groups, including control group(Kasumi-1 cells treated with non-specific siRNA), TAK1 specific siRNA treated group (Kasumi 1 treated with TAK specific siRNA), As2O3 treated group (Kasumi 1 cells treated with As2O3) and combined treated group (Kasumi 1 cells treated with TAK1 specific siRNA plus As2O3)...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28440423/upregulated-microrna-429-inhibits-the-migration-of-hcc-cells-by-targeting-traf6-through-the-nf-%C3%AE%C2%BAb-pathway
#14
Peng Wang, Jia Cao, Shihai Liu, Huazheng Pan, Xiangping Liu, Aihua Sui, Liping Wang, Ruyong Yao, Zimin Liu, Jun Liang
Increasing evidence indicates that miR-429 is involved in tumor suppression in various human cancers. however, its role in hepatocellular carcinoma (HCC) remains unclear. In the present study, we found that miR-429 was significantly downregulated in HCC tissue samples and cell lines. Upregulation of miR-429 markedly suppressed proliferation and migration of HCC cells. Moreover, we identified TRAF6 as a direct target of miR-429. Downregulation of TRAF6 partially attenuated the oncogenic effect of anti‑miR-429 on HCC cells...
May 2017: Oncology Reports
https://www.readbyqxmd.com/read/28437727/new-inter-correlated-genes-targeted-by-diatom-derived-polyunsaturated-aldehydes-in-the-sea-urchin-paracentrotus-lividus
#15
Nadia Ruocco, Anna Maria Fedele, Susan Costantini, Giovanna Romano, Adrianna Ianora, Maria Costantini
The marine environment is continually subjected to the action of stressors (including natural toxins), which represent a constant danger for benthic communities. In the present work using network analysis we identified ten genes on the basis of associated functions (FOXA, FoxG, GFI-1, nodal, JNK, OneCut/Hnf6, TAK1, tcf4, TCF7, VEGF) in the sea urchin Paracentrotus lividus, having key roles in different processes, such as embryonic development and asymmetry, cell fate specification, cell differentiation and morphogenesis, and skeletogenesis...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28430599/tak1-inhibitor-5z-7-oxozeaenol-sensitizes-cervical-cancer-to-doxorubicin-induced-apoptosis
#16
Shan Guan, Jiaxiong Lu, Yanling Zhao, Sarah E Woodfield, Huiyuan Zhang, Xin Xu, Yang Yu, Jing Zhao, Shayahati Bieerkehazhi, Haoqian Liang, Jianhua Yang, Fuchun Zhang, Surong Sun
Aberrant activation of nuclear factor-κB (NF-κB) allows cancer cells to escape chemotherapy-induced cell death and acts as one of the major mechanisms of acquired chemoresistance in cervical cancer. TAK1, a crucial mediator that upregulates NF-κB activation in response to cellular genotoxic stress, is required for tumor cell viability and survival. Herein, we examined whether TAK1 inhibition is a potential therapeutic strategy for treating cervical cancer. We found that TAK1 inhibitor 5Z-7-oxozeaenol significantly augmented the cytotoxic effects of Dox in a panel of cervical cancer cell lines...
May 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28424289/disruption-of-mda5-mediated-innate-immune-responses-by-the-3c-proteins-of-coxsackievirus-a16-coxsackievirus-a6-and-enterovirus-d68
#17
Yajuan Rui, Jiaming Su, Hong Wang, Junliang Chang, Shaohua Wang, Wenwen Zheng, Yong Cai, Wei Wei, James T Gordy, Richard Markham, Wei Kong, Wenyan Zhang, Xiao-Fang Yu
Coxsackievirus A16 (CV-A16), A6 (CV-A6), and enterovirus D68 (EV-D68) belong to the Picornaviridae family and are major causes of hand, foot, and mouth disease (HFMD) and pediatric respiratory disease worldwide. The biological characteristics of these viruses, especially their interplay with the host innate immune system, have not been well investigated. In this study, we discovered that the 3C(pro) proteins from CV-A16, CV-A6, and EV-D68 bind MDA5 and inhibit its interaction with MAVS. Consequently, MDA5-triggered type I IFN signaling in the RLR pathway was blocked by CV-A16, CV-A6, and EV-D68 3C(pro) Furthermore, CV-A16, CV-A6, and EV-D68 3C(pro) all cleave TAK1, resulting in inhibition of NF-κB activation, a host response also critical for toll-like receptor (TLR) mediated signaling...
April 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28416436/molecular-cloning-of-chicken-interleukin-17b-which-induces-proinflammatory-cytokines-through-activation-of-the-nf-%C3%AE%C2%BAb-signaling-pathway
#18
Cong Thanh Hoang, Yeojin Hong, Anh Duc Truong, Janggeun Lee, Kyungbaek Lee, Yeong Ho Hong
Interleukin (IL)-17B is a little known member of the IL-17 cytokine family, which plays an important role in immunity by regulating the expression of proinflammatory cytokines. In this study, we determined the coding sequence and biological functions of a novel chicken IL-17B (chIL-17B). The full-length chIL-17B coding sequence includes 567 nucleotides encoding 188 amino acids, which was identified in small intestinal epithelial cells. The chIL-17B protein shares 96.48% amino acid sequence identity with turkey, 92...
April 14, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28415764/inhibitor-of-tec-kinase-lfm-a13-decreases-pro-inflammatory-mediators-production-in-lps-stimulated-raw264-7-macrophages-via-nf-%C3%AE%C2%BAb-pathway
#19
Fei Wang, Wei Zhang, Chao Wang, Xu Fang, Hao Cheng, Sheng Liu, Xu-Lin Chen
Tec kinase, a prototypical member of the Tec tyrosine kinases family, was shown to mainly govern lymphocyte proliferation. In the present study, we investigated the role of Tec kinase in acute inflammatory response in lipopolysaccharide (LPS) challenge. First, we demonstrate that Tec kinase activity was observed in RAW264.7 macrophages exposed to LPS. Tec and phosphorylated Tec expression were upregulated in a dose- and time-dependent manner after LPS stimulation. LPS increased monocyte chemotactic protein (MCP)-1 secretion and intercellular adhesion molecule (ICAM)-1 expression, and increasing mRNA expression was consistently observed...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28410990/tyrosine-kinase-syk-licenses-myd88-adaptor-protein-to-instigate-il-1%C3%AE-mediated-inflammatory-disease
#20
Prajwal Gurung, Gaofeng Fan, John R Lukens, Peter Vogel, Nicholas K Tonks, Thirumala-Devi Kanneganti
Mice carrying a hypomorphic point mutation in the Ptpn6 gene (Ptpn6(spin) mice) develop an inflammatory skin disease that resembles neutrophilic dermatosis in humans. Here, we demonstrated that interleukin-1α (IL-1α) signaling through IL-1R and MyD88 in both stromal and immune cells drive inflammation in Ptpn6(spin) mice. We further identified SYK as a critical kinase that phosphorylates MyD88, promoted MyD88-dependent signaling and mediates dermatosis in Ptpn6(spin) mice. Our studies further demonstrated that SHP1 encoded by Ptpn6 binds and suppresses SYK activation to inhibit MyD88 phosphorylation...
April 18, 2017: Immunity
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